I've been getting a check engine light. My FIXD OBD-II Active Car Health Monitor was showing a P0121 code and says it's a serious problem. I replaced my throttle position sensor with a Duralast TPS4270 from Autozone. Now the engine idles between 2000 and 2500 RPMs. Prior to replacing the sensor the truck was running perfect with the exception of the check engine light. Any suggestions?

 

Well I wouldnt drive it if it wont idle. Could be the new TPS was made in China and is a POS too.

 

I'm not a fan of duralast, anything,but dirty throttle body?blade not closing all the way?

 

Relearn procedure:
After I posted this question here I found this video on youtube. What did I ever do without youtube! Apparently it takes a while for the truck's computer to relearn the position of the throttle.(When I replaced the sensor I cleaned the carbon buildup off the throttle body. Made it shine like new!) After trying the 3 minute idle, 1 minute off, 3 minute idle procedure several times and driving it around over 44 mph several times with no success, I let it sit over night and the problem fixed itself. Wish all my mechanical problems resolved themselves that way.

 

Bunch of bolagna,right?it's got a crank sensor, should know it a lot quicker than that,so I have to tell someone,I fixed it,but you can't drive for a day

 

Where is your TPS Sensor located ? Ive been havin trouble find mine.